clean up some descriptions

Author: graphaelli

docs/spec/metricsets/common_metricset.json

@@ -6,7 +6,7 @@
     "properties": {
         "samples": {
             "type": ["object"],
-            "description": "Sampled application metrics collected from the agent",
+            "description": "Sampled application metrics collected from the agent.",
             "patternProperties": {
                 "^[^*\"]*$": {
                     "$ref": "sample.json"
@@ -16,7 +16,7 @@
         },
         "tags": {
             "type": ["object", "null"],
-            "description": "A flat mapping of user-defined tags with string values",
+            "description": "A flat mapping of user-defined tags with string values.",
             "patternProperties": {
                 "^[^*\"]*$": {
                     "type": ["string", "null"],

docs/spec/spans/v1_span.json

@@ -8,12 +8,12 @@
         {  
             "properties": {
                 "id": {
-                    "description": "ID od the span.",
+                    "description": "ID of the span.",
                     "type": ["integer", "null"]
                 },
                 "transaction_id": {
                     "type": "string",
-                    "description": "UUID for the parent transaction",
+                    "description": "UUID of the enclosing transaction.",
                     "pattern": "^[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12}$"
                 },       
                 "parent": {
@@ -22,7 +22,7 @@
                 },
                 "start": {
                     "type": "number",
-                    "description": "Offset relative to the transaction's timestamp identifying the start of the span, in milliseconds"
+                    "description": "Offset relative to the transaction's timestamp identifying the start of the span, in milliseconds."
                 }
             },
             "required": ["start"],